Wide Compatibility: Models: 82300, 82310, 82312, CST500, CST800, GE600, GE800, GL250, GL310, GL360, GLC500, ST200, ST300, ST400, ST1000, ST3000, ST4000, ST4050, ST4400, 500, ST5000, ST6500, ST6800, ST7600 Save Money and Time: Contoured shape allows less resistance for more efficient cuts. With the automatic feeding system, the replacement spool eliminates the tedious work of manually winding spools by hand. Premium Quality: Made of flexible and flexible braided synthetic copolymer nylon resin, which allows the line to stretch and absorb shocks on surfaces Healthier and Greener - This is good for your lawn. It is superior to the standard round line because it creates an improved cutting action, which helps keep the lawn healthier and greener. Package includes: 6pcs cutting line. Replacement part not original.